Adjustable lamp



FIG. 1 is a perspective view of an adjustable lamp showing my new design, the arm and base being shown in broken lines for illustrative purposes only;

FIG. 2 is a right side elevational view of the adjustable lamp on an enlarged scale, the left side being a mirror image;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom perspective view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a rear elevational view thereof. 

The ornamental design for an adjustable lamp, as shown and described. 